FVXX21 KWBC 280500
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0500 UTC 28 MAY 2000 BY THE WASHINGTON VAAC
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TUNGURAHUA 00-622 ECUADOR 0128S 7826W
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BACKGROUND: TUNGURAHUA ECUADOR (1502-08)
SUMMIT HEIGHT 16480 FT (5023 M)
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SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL
IMAGERY...GUAYAQUIL METEOROLOGICAL WATCH OFFICE..UPPER AIR
WIND FORECAST FROM THE AVIATION MODEL.
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ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS.
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DETAILS OF ASH: SATELLITE IMAGERY THROUGH 28/0415 UTC SHOWS
EXTENSIVE LOW AND MID LEVEL CLOUDS IN THE AREA AROUND THE
VOLCANO MAKING IT DIFFICULT TO DETECT ANY VOLCANIC ASH. THE
VOLCANO REMAINS UNSTABLE AND AN ERUPTION OF ASH AND STEAM CAN
OCCUR AT ANY TIME.
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TRAJECTORY: UPPER AIR WIND PATTERNS SUGGEST THAT ANY ASH
BETWEEN THE SUMMIT AND FL250 WOULD MOVE TO THE WEST AT UP TO
25 KNOTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT STATEMENT WILL BE ISSUED BY 28/1100 UTC.
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REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC
ASH ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING
ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS
http://www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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KARST
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